New problem with the Cobolt discus - Yesterday he started jerking a little while swimming. Then today, he went missing (He is usually the most social of the bunch: hanging around the front of the tank, and dominating the others) I found him up top, on his side gasping, occasionaly in sheer desperation trying to swim back down into the tank, with a serious bloat to his stomach (I assume thats his stomach). He seems to of recovered, but occasionally still swimming with a jerky motion. Last week one of his gills was swollen, but seemed to go the next day, with the other side swelling - then that went. He is, out of all the discus, the only one who eats not only the flakes I put in, but also the Pleco's algae wafers. I was told by the guy I got it from that it sounded like swim bladder? But after browsing the net, I'm not so sure. This evening he is back to normal, and also seems to not be stamping his authority like he usually does, but in general a happy chap. I've done a 50% water change, and all stats are good.
Is there anything anyone can suggest? I don't want to lose my top dog.